Sieving machine

The utility model provides a sieving machine. A machine frame is connected with a speed regulating motor and a speed reducer. A horizontal type rotational screen barrel is arranged on a plane of the machine frame. A central axis is driven by the motor. The screen barrel is composed of a screen frame which is connected between a left bracket of the screen mesh and a right bracket of the screen mesh, and the screen mesh which is connected to the screen frame. Blades which are connected to the central axis and a cyclone wheel are positioned in the screen mesh. The upper part of one end of the screen barrel is connected with a feed hopper, and the lower part of the other end of the screen barrel is provided with a discharge hopper for coarse material. A machine cover and a discharge hopper for fine material are respectively arranged above and below the screen mesh. A right sleeve spindle which is arranged at the outside of the central axis and a right sleeve spindle are respectively connected with the right bracket of the screen mesh and the left bracket of the screen mesh, and one end of the right sleeve spindle is connected with a driving wheel which is driven by the speed reducer.